1. Download TimeToPic bundle and test if you like TimeToPic as measurement UI. TimeToPic has many other uses too in addition to power profiling. If you plan log also software activity, do minimal instrumentation to application and verify setup.

3. Purchase from LabJack needed components. In addition to power profile, LabJack DAQ can be used for other electronics measurement and test automation HW interface. Your choices are U3-HV or U3-HV+LJTick-InAmp.